void f(){
    int x = -1, y = 0, z = 100;
    while(y<z){
        x += 1;
        while (x < y) {
            x += 1;
        }
        x = x / -1;
        y = y + 1;
        if (x > 0) {
            x -= 1;
        }
    }
}
